Tournament of TV Fanatic: Chris O'Donnell vs. Kaley Cuoco!

It's time for you, TV Fanatics, to choose your top CBS star! We'll be conducting surveys among fan favorites from across the network. The concept is easy: Pick your favorite of the two pairs in each poll. That's it!

Yesterday, Mark Harmon and Jon Cryer started us off. That contest remains open, as will all polls until the entire round is concluded, so feel free to vote in that one too if you haven't already!

On tap today? Our #8 seed, NCIS LA's Chris O'Donnell, against #9 Kaley Cuoco of The Big Bang Theory! Which actor do you love most? VOTE, then check out the full CBS bracket below: